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Finding the Fourth Proportional to 418,719.08, 628,066.86 and 134,407.40

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Solution

The fourth proportional to 418,719.08, 628,066.86 and 134,407.40 is: 201,607.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,719.08 : 628,066.86 = 134,407.40 : x
  2. Step 2: Convert to fraction form
    418,719.08/628,066.86 = 134,407.40/x
  3. Step 3: Cross multiply
    418,719.08x = 628,066.86 × 134,407.40
  4. Step 4: Simplify right side
    418,719.08x = 84,416,833,678.76
  5. Step 5: Solve for x
    x = 84,416,833,678.76/418,719.08
  6. Step 6: Final answer
    x = 201,607.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.